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./recvlkv373.py 226.2.2.2 2068 out.mjpeg
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#!/usr/bin/env python | |
import socket | |
import binascii | |
import sys | |
def main(): | |
MCAST_GRP = sys.argv[1] | |
MCAST_PORT = int(sys.argv[2]) | |
f = open(sys.argv[3], 'w') | |
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP) | |
try: | |
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) | |
except AttributeError: | |
pass | |
sock.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_TTL, 32) | |
sock.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_LOOP, 1) | |
sock.bind((MCAST_GRP, MCAST_PORT)) | |
host = socket.gethostbyname('0.0.0.0') | |
sock.setsockopt(socket.SOL_IP, socket.IP_MULTICAST_IF, socket.inet_aton(host)) | |
sock.setsockopt(socket.SOL_IP, socket.IP_ADD_MEMBERSHIP, | |
socket.inet_aton(MCAST_GRP) + socket.inet_aton(host)) | |
startoutput=0 | |
buf = bytearray(10*1024*1024) | |
while 1: | |
try: | |
data, addr = sock.recvfrom(1316) | |
except socket.error, e: | |
print 'Expection' | |
frame_n=ord(data[0])*256+ord(data[1]) | |
part=(ord(data[2])&0x7f)*256+ord(data[3]) | |
end=ord(data[2])&0x80 > 0 | |
frdat = data[4:] | |
offset = part*1020 | |
buf[offset:offset+len(frdat)] = frdat | |
if part == 0: | |
#f = open('out/'+str(frame_n)+"_"+str(part).zfill(3)+'.jpg', 'w') | |
startoutput=1 | |
if startoutput==1: | |
sys.stderr.write("%d,%d,%d:%s\r" % ( frame_n, part, len(data), data[:20].encode("hex"))) | |
if end: | |
f.write("\r\n\r\n--myboundary\r\nContent-Type: image/jpeg\r\n\r\n") | |
f.write(buf[:offset+len(frdat)]) | |
pass | |
#sys.stderr.write("---END---\n") | |
#f.write(data[4:]) | |
if __name__ == '__main__': | |
main() |
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